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A number of household water treatment and safe storage technologies, such as chlorine disinfection, solar disinfection, and ceramic filtration, have been documented for their ability to reduce diarrheal disease and improve microbial water quality. The biosand filter (BSF) is a promising household water treatment technology in use by > 500,000 people globally. The purpose of this research was to document the ability of BSFs to improve water quality and to reduce diarrheal disease in user compared with non-user households in a randomized controlled trial in Bonao, Dominican Republic, during 2005–2006. During the 6-month intervention period, 75 BSF households had significantly improved drinking water quality on average compared with 79 control households ( P < 0.001). Based on random intercepts logistic regression, BSF households had 0.53 times the odds of diarrheal disease as control households, indicating a significant protective effect of the BSF against waterborne diarrheal disease


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Stauber, C.E., G.M. Ortiz, D.P. Loomis, and M.D. Sobsey. 2009. A Randomized Controlled Trial of the Concrete Biosand Filter and its Impact on Diarrheal Disease in Bonao, Dominican Republic. American Journal of Tropical Medicine and Hygiene, 80(2):286-293.

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In Am J Trop Med Hyg 80: 286-293 by Stauber et al, there is an error in the text on page 290. This error appears in the second column in the paragraph above the Discussion. The sentence should read "More than 60% of drinking water from BSF households had

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